<template>
    <div class="login_container">
        <div class="login_box">
            <!-- 头像区域 -->
            <div class="avatar_box">
                <img src="../assets/logo.png" alt="">
            </div>
            <!-- 登录表单区域 -->
            <el-form ref="loginFormRef" :model="loginForm" :rules="loginFormRules" label-width="0px" class="login_form">
                <!-- 用户名 -->
                <el-form-item prop="username">
                    <el-input v-model="loginForm.username" prefix-icon="iconfont icon-user"></el-input>
                </el-form-item>

                <!-- 密码 -->
                <el-form-item prop="password">
                    <el-input v-model="loginForm.password" prefix-icon="iconfont icon-3702mima" show-password></el-input>
                </el-form-item>

                <el-form-item class="btns">
                    <el-button type="primary" @click="login">登录</el-button>
                    <el-button type="info" @click="resetLoginForm">重置</el-button>
                </el-form-item>
            </el-form>
        </div>

    </div>
</template>
<script>
export default {
  data () {
    return {
      // 登录表单对应数据对象
      loginForm: {
        username: 'admin',
        password: '123456'
      },
      // 表单验证规则对象
      loginFormRules: {
        // 验证用户名是否合法
        username: [
          { required: true, message: '请输入用户名', trigger: 'blur' }
          // { min: 3, max: 5, message: '长度在3-5个字符', trigger: 'blur' }
        ],
        // 验证密码发是否合法
        password: [
          { required: true, message: '请输入密码', trigger: 'blur' }
        ]
      }
    }
  },
  methods: {
    resetLoginForm: function () {
      // 重置不是清空，而是将数据恢复为默认值
      this.$refs.loginFormRef.resetFields()
    },
    login: function () {
      this.$refs.loginFormRef.validate(async valid => {
        if (!valid) {
          return
        }
        const { data: response } = await this.$http.post('login', this.loginForm)
        if (response.meta.status !== 200) {
          this.$message({
            message: '登录失败',
            type: 'error'
          })
          return
        }
        window.sessionStorage.setItem('token', response.data.token)
        this.$router.push('/home')
      })
    }
  }
}
</script>
<style scoped lang="less">
.login_container{
    background-color: #2b4b6b;
    height: 100%;
}
.login_box{
    width: 450px;
    height: 300px;
    background-color: #fff;
    border-radius: 3px;
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);

    .avatar_box{
        width: 130px;
        height: 130px;
        border: solid 1px #eee;
        border-radius: 50%;
        padding: 10px;
        box-shadow: 0 0 10px #eee;
        position: absolute;
        left: 50%;
        transform: translate(-50%, -50%);
        background-color: #fff;
        img{
            width: 100%;
            height: 100%;
            border-radius: 50%;
            background-color: #eee;
        }
    }
    .login_form{
        position: absolute;
        bottom: 0;
        width: 100%;
        padding: 0 20px;
        box-sizing: border-box;
        .btns{
            display: flex;
            justify-content: flex-end;
        }
    }
}
</style>
